pgsql: Release notes for 9.6.1, 9.5.5, 9.4.10, 9.3.15, 9.2.19, 9.1.24.

Release notes for 9.6.1, 9.5.5, 9.4.10, 9.3.15, 9.2.19, 9.1.24.

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/7d80417d3dfc88b0c03b5c08a18b29f9d430e217

Modified Files
--------------
doc/src/sgml/release-9.1.sgml | 210 +++++++++++
doc/src/sgml/release-9.2.sgml | 266 ++++++++++++++
doc/src/sgml/release-9.3.sgml | 329 +++++++++++++++++
doc/src/sgml/release-9.4.sgml | 466 ++++++++++++++++++++++++
doc/src/sgml/release-9.5.sgml | 812 ++++++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-9.6.sgml | 586 ++----------------------------
6 files changed, 2103 insertions(+), 566 deletions(-)